Systems and arrangements for sensing current with a low loss...

Details Systems and arrangements for sensing current with a low loss... Systems and arrangements for sensing current with a low loss...

2006-06-29

2009-02-17

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S705000

Reexamination Certificate

active

07492171

ABSTRACT:
One arrangement includes a sense element to convey a current from a source to a load and a compensation element located proximate to the sense element. The compensation element having a resistance that changes proportional to a change in temperature of the sense element. The arrangement further includes an operational amplifier having a first input connected to the sense element, a second input connected to the compensation element and an output that provides an output signal that biases a current through the compensation element in response to a voltage across the sense element. The bias current provides an output signal proportional to the conveyed current and the compensation element provides temperature compensation for the output signal. Other embodiments are also disclosed.

REFERENCES:
patent: 5663667 (1997-09-01), Blum et al.
patent: 6046556 (2000-04-01), Cargille
patent: 2007/0274015 (2007-11-01), Isham

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